

class Car(object):
    def __init__(self, color, csfe):
        self.color = color
        self.csfe = csfe

    def introduce(self):
        print(f"我是一辆{self.color}的车，我的百公里油耗是{self.csfe}。")


class Racing_Car(Car):
    def __init__(self, color, csfe, acceleration_time, max_speed):
        super().__init__(color, csfe)
        self.acceleration_time = acceleration_time
        self.max_speed = max_speed


class Bus(Car):
    def __init__(self, color, csfe, passenger_capacity):
        super().__init__(color, csfe)
        self.passenger_capacity = passenger_capacity
